JP2022168447A - power supply system - Google Patents

Abstract

To provide a power supply system that facilitates drawing-out of electric power deposited in advance by a user of a vehicle through electric vehicle supply equipment (EVSE), thereby reducing an electricity charge burden of the user.SOLUTION: A server 300 in a power supply system receives each of a power deposit application and a power drawing application from a user of a vehicle 210. The server 300 records, when receiving the power deposit application from the user and confirming that power is deposited in accordance with this application, an amount of deposited power in association with the user. When the user whose deposited power amount is recorded in the server 300 uses target equipment (EVSE-1), which is one of a plurality of EVSEs, to supply power to the vehicle 210, if the user makes the power drawing application to the server 300, the server 300 notifies an electric power supply operator (contract DPO) supplying power to the target equipment that at least a part of the deposited power amount is drawn out and supplied to the target equipment.SELECTED DRAWING: Figure 8

Description

The present disclosure relates to power feeding systems.

For example, in the system disclosed in Japanese Patent Laying-Open No. 2019-197425 (Patent Document 1), an electric power company (for example, an electric power/gas retailer) takes charge of electric power from a user and accepts the electric power in response to a return request from the user. provide a service to return the electricity that has been lost.

JP 2019-197425 A

In recent years, the liberalization and unbundling of the electric power industry have progressed, and the number of electric power companies (power transmission and distribution companies, etc.) is increasing. In addition, with the spread of electric vehicles, infrastructure (charging infrastructure) for charging power storage devices mounted on electric vehicles has been developed, and EVSE (Electric Vehicle Supply Equipment) is increasing. The EVSE is installed at the charging station. The owner of the charging station can conclude a contract with any power transmission and distribution business operator and receive power supply from the contracted power transmission and distribution business operator. The power transmission and distribution company supplies power to the contracted EVSE, but does not manage the EVSE.

In the system described in Patent Literature 1, a user (customer) applies to an electric power company to deposit/withdraw electric power. However, when the user of the vehicle draws out the electric power deposited in advance from the EVSE on the go, the user must ensure that the electric utility company who deposited the electric power matches the electric utility company who supplies electric power to the EVSE to be used from now on. After confirmation, it is not always easy to apply for power withdrawal to the electric power company. In addition, a model in which an electric power company provides a service related to an application for electric power deposit/withdrawal is difficult to establish as a business model because the cost borne by the electric power company for providing the service becomes too large.

The present disclosure has been made in order to solve the above problems, and the purpose thereof is to facilitate the withdrawal of electric power deposited in advance by the user of the vehicle from the electric power supply equipment (EVSE), thereby reducing the burden of the user's electricity bill. It is to provide a power supply system capable of

A power supply system according to the present disclosure includes a server that manages a plurality of power supply facilities. Each of the plurality of power supply facilities is configured to supply power to the vehicle. The server is configured to receive each of a power deposit application and a power withdrawal application from a user of the vehicle. The server is configured to receive an electric power deposit application from a user, confirm that electric power has been deposited according to the application, and record the amount of electric power deposited in association with the user. When a user whose amount of electric power is deposited in the server supplies power to a vehicle using a target facility that is one of a plurality of power supply facilities, when the user submits a power withdrawal application to the server, The server is configured to notify an electric utility supplying power to the target facility that at least a portion of the deposited power amount will be withdrawn and supplied to the target facility.

Hereinafter, the server will also be referred to as a "management server". Also, a company that manages the plurality of power supply facilities using a management server is also called a "facility management company." Further, each of the plurality of power supply facilities managed by the management server is also referred to as "management facility". The owner of the installation location (station) of the management facility is also called a "site host." The management facility functions as EVSE (Electric Vehicle Supply Equipment).

The management server receives applications for power deposit/power withdrawal, and manages the amount of deposited power for each user. Therefore, the management server can easily confirm the power that can be drawn by the user in each management facility. When the user of the vehicle withdraws the electric power deposited in advance from the management facility outside the vehicle, the vehicle user applies to the management server (equipment management business operator) to withdraw the electric power. can be pulled out. The user can deposit surplus power (or power procured at a low cost) and withdraw the deposited power for use, thereby reducing the burden of the user's electricity charges (charges for purchasing power from the electric utility).

In addition, in the above-described power supply system, the management server (facility management company) mediates between the vehicle user and the electric power company (power transmission/distribution company), which facilitates establishment of a business model. Since the facility management business operator can receive a service fee (compensation for managing the power supply facility) from the site host, the above service (more specifically, electricity deposit) can be provided free of charge or at a low price to the vehicle user. / services related to application for withdrawal of electricity). For this reason, the power supply system described above can facilitate the withdrawal of electric power deposited in advance by the user from the power supply equipment (EVSE), thereby reducing the user's burden of electricity charges.

The management server may be configured to manage the location and fees for each managed facility (eg, fees paid to the site host by users who use the power supply facility). The management server may be configured to notify the user of information (eg, location) of each management facility. The management server may be a cloud server.

A site host may purchase power supply equipment from a facility management company. In addition, the facility management company may lease the power supply facility to the site host. The facility management business operator may be a CPO (Charge Point Operator).

The electric utility may be a specified scale electric utility. Specified-scale electric utilities are new entrant electric utilities that entered the power transmission and distribution business after general electric power transmission and distribution utilities. Therefore, acquiring new customers is very important for specified-scale electric power companies. The provision of the above service (service related to application for power deposit/withdrawal) by the specified-scale electric power company together with the equipment management company can be an opportunity for the specified-scale electric power company to acquire new customers. A business model can easily be established in a power supply system in which the electric utility is a specified-scale electric utility.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a power supply system that allows a user of a vehicle to easily withdraw electric power deposited in advance from the power supply equipment (EVSE), thereby reducing the user's burden of electricity charges.

1 is a diagram showing a schematic configuration of a power feeding system according to an embodiment of the present disclosure; FIG. FIG. 4 is a diagram for explaining facilities provided in a user's home in the power feeding system according to the embodiment of the present disclosure; FIG. 4 is a diagram showing information held by a server and a plurality of EVSEs included in management equipment in the power supply system according to the embodiment of the present disclosure; FIG. 4 is a diagram for explaining the flow of money regarding the use of EVSE in the power supply system according to the embodiment of the present disclosure; FIG. FIG. 4 is a diagram for explaining processing related to user registration executed in the power supply system according to the embodiment of the present disclosure; FIG. FIG. 4 is a diagram for explaining processing related to power deposit executed in the power supply system according to the embodiment of the present disclosure; FIG. FIG. 4 is a diagram for explaining processing related to car navigation executed in the power supply system according to the embodiment of the present disclosure; FIG. FIG. 4 is a diagram for explaining a process related to drawing power that is executed in the power supply system according to the embodiment of the present disclosure; FIG. FIG. 10 is a diagram showing a modification of the form of power deposit and power withdrawal; 9 is a diagram showing a modification of the form of power draw shown in FIG. 8; FIG.

Embodiments of the present disclosure will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated. Hereinafter, "EVSE" means electric vehicle supply equipment. Also, "CPO" means a charging station operator (Charge Point Operator). Also, "DPO" means a power transmission and distribution operator (Distribute Power Operator).

FIG. 1 is a diagram showing a schematic configuration of a power supply system according to this embodiment. Referring to FIG. 1, power supply system 1 includes a user's home, a vehicle 210 owned by the user, a mobile terminal 220 carried by the user, a server 300 owned by a CPO, and a management facility 310 managed by the CPO. , and servers 610, 620, . . . owned by DPO-1, DPO-2, . Each server includes a processor, a RAM (Random Access Memory), a storage device, and a communication device (all not shown). Various processes in the server are executed by the processor executing the programs stored in the storage device.

The power system PG is a power network installed in a predetermined area (including the user's home and the management facility 310). Each of the plurality of DPOs (DPO-1, DPO-2, . . . ) procures electric power and supplies the procured electric power to the power system PG. Servers 610, 620, . . . are terminals used by DPO-1, DPO-2, .

The server 300 is a terminal belonging to a CPO (charging station operator). The server 300 is configured to manage a management facility 310, which will be described in more detail below. The management facility 310 includes a plurality of EVSEs powered by a DPO (one of DPO-1, DPO-2, . . . ). In this embodiment, each EVSE included in management facility 310 is provided by the CPO to the site host (owner of the charging station) and installed at the charging station. An EVSE installed at a charging station corresponds to a public EVSE that can be used by an unspecified number of users. In this embodiment, the server 300 and CPO respectively correspond to a "management server" and a "facility management company".

The server 300 is configured to provide an aggregation cloud (a cloud for aggregating multiple EVSEs) and an EVSE management cloud (a cloud for individually managing multiple EVSEs). The EVSE management cloud is configured to manage, for example, each EVSE's location, specifications, status, reservation status, and billing status. The EVSE management cloud is also configured to use an external payment system 320 to make payments for the use of EVSE. A communication protocol between the EVSE management cloud and each EVSE may be OCPP (Open Charge Point Protocol). The communication protocol between the EVSE management cloud and the payment system 320 may be OICP (Open InterChange Protocol) or OCPI (Open Charge Point Interface).

Vehicle 210 includes a power storage device (for example, battery B shown in FIG. 8 to be described later) configured to be charged with power supplied from an EVSE included in management facility 310, and uses the power stored in the power storage device. configured to run Vehicle 210 may be an EV (electric vehicle) without an engine (internal combustion engine) or a PHV (plug-in hybrid vehicle) with an engine (internal combustion engine).

The mobile terminal 220 corresponds to a terminal carried by a user. The mobile terminal 220 incorporates a computer. In this embodiment, a smart phone equipped with a touch panel display is adopted as the mobile terminal 220 . However, the mobile terminal 220 is not limited to this, and any mobile terminal can be adopted as the mobile terminal 220, and a tablet terminal, a wearable device (for example, smart watch), an electronic key, or a service tool can be adopted.

FIG. 2 is a diagram for explaining facilities provided in a user's home. Referring to FIG. 2 in conjunction with FIG. 1, the user's home includes house 100 . A solar panel 110 is installed on the roof of the house 100 . A PCS (Power Conditioning System) 120 , a distribution board 141 , a power load 142 , and a smart meter 143 are provided inside the house 100 . Also, an ESS (Energy Storage System) 130 and an EVSE 150 are installed in the site (outdoors) of the user's home.

The power load 142 is an electrical device used indoors and is supplied with power from the distribution board 141 . The power load 142 may be connected to the distribution board 141 via an outlet (not shown). Power loads 142 may be lighting fixtures, air conditioners, cooking appliances, information appliances, telephones, televisions, refrigerators, washing machines, vacuum cleaners, or irons.

EVSE 150 is a facility for supplying power to a vehicle (for example, vehicle 210 shown in FIG. 1), and is supplied with power from distribution board 141 . EVSE 150 and the vehicle are electrically connected by connecting (plugging in) connector 151 of charging cable 152 connected to the main body of EVSE 150 to the inlet of the vehicle. In such a plug-in state, EVSE 150 can use power supplied from distribution board 141 to supply power to the vehicle.

Solar panel 110 generates power using sunlight. The solar panel 110 is a naturally fluctuating power source whose power generation output fluctuates depending on weather conditions, and outputs the generated power to the PCS 120 . The PCS 120 has a function of converting generated power into system power (power of the power system PG). PCS 120 includes DC/DC converter 121 , inverter 122 , DC/DC converter 123 , and controller 124 . Control device 124 controls DC/DC converter 121, inverter 122, and DC/DC converter 121, inverter 122, and It is configured to control each of the DC/DC converters 123 . In addition, the control device 124 reversely flows the power generated by the solar panel 110 or the power stored in the ESS 130 to the power system PG according to instructions from the user.

The DC/DC converter 121 transforms the DC power generated by the solar panel 110 into a voltage corresponding to the grid power. Inverter 122 converts the DC power output from DC/DC converter 121 into AC power according to the system power, and outputs the AC power to distribution board 141 . The control device 124 can adjust the power input from the solar panel 110 to the distribution board 141 by controlling at least one of the DC/DC converter 121 and the inverter 122 .

DC/DC converter 123 transforms the DC power output from DC/DC converter 121 into a voltage suitable for charging ESS 130 and outputs the voltage to ESS 130 . The control device 124 can adjust the power input from the solar panel 110 to the ESS 130 by controlling at least one of the DC/DC converter 121 and the DC/DC converter 123 .

At the time of interconnection, power is supplied from the power system PG to the distribution board 141 . During a power outage (that is, when the house 100 cannot receive power supply from the power system PG), the solar panel 110 and the ESS 130 function as power sources for self-sustained operation.

The power system PG is connected to power generation equipment and power storage equipment (including solar panels 110 and ESS 130) installed in various buildings, as well as many power generation equipment and power storage equipment (not shown) owned by various electric power companies. adjusted to achieve simultaneous equality (balancing).

A consumer can use the power of the power system PG by making a contract with a DPO (power transmission and distribution operator). The power used by the consumer is supplied to the power system PG by the DPO contracting with the consumer. Such a mechanism achieves simultaneous equality of the power system PG. The DPO can supply power generated by its own power generation equipment to the power grid PG, or can supply power procured from the outside (for example, the power market) to the power grid PG.

A user in this embodiment has a contract with DPO-1 of a number of DPOs (eg, DPO-1, DPO-2, . . . shown in FIG. 1). The user pays the DPO-1 an electricity fee (consideration for power supply) according to the amount of electricity used. A server 610 belonging to DPO-1 obtains power usage from the smart meter 143 . The smart meter 143 is a watt-hour meter that measures the amount of power of the power system PG used in the user's home (that is, the amount of power supplied from the power system PG to the user's home). The smart meter 143 is maintained and managed by DPO-1. The smart meter 143 measures the amount of power usage every predetermined time period (for example, every 30 minutes), stores the measured power usage amount, and transmits the measured power usage amount to the server 610 . In addition, smart meter 143 transmits the measured value of power consumption to server 610 in response to a request from server 610 .

The server 610 assigns a customer ID (information for identifying the customer) to a customer who has signed a contract, and manages information about the customer (hereinafter also referred to as "customer information"). Customer information is stored in the storage device of server 610 . Customer information is managed separately for each customer by a customer ID. The customer information managed by the server 610 includes the amount of electric power used, as well as the amount of electric power deposited and the amount of electric power withdrawn (see FIGS. 6 and 8).

DPO-1 in this embodiment is a specified scale electric utility (also commonly referred to as "PPS" or "new power"). More than 30% of DPO-1's power source composition (kW ratio) depends on wholesale power exchanges. For this reason, DPO-1 can easily adjust power trading even if there is some power fluctuation due to deposit/withdrawal of power, which will be described later.

FIG. 3 is a diagram showing a plurality of EVSEs included in the management facility 310 and information held by the server 300. As shown in FIG. In FIG. 3, the X and Y coordinates indicate longitude and latitude (EVSE position). Referring to FIG. 3 in conjunction with FIG. 1, management facility 310 includes EVSE-1 through EVSE-6. Each EVSE included in the management facility 310 receives power supply from the power grid PG. Each EVSE uses power supplied from power system PG to supply power to the vehicle. Therefore, the site host pays the contracted DPO an electricity charge corresponding to the amount of charge (the amount of power used for charging). A contracted DPO is a DPO that supplies power to EVSEs belonging to a site host based on a contract with the site host. In this embodiment, the electricity bill for using EVSE is metered. Hereinafter, the electricity charge unit price for using EVSE will be referred to as "charging unit price".

The charge unit price is, for example, an electricity charge per unit electric energy (unit charge amount). However, the charging unit price may be an electricity charge per unit time (unit charging time). The charging unit price varies depending on the DPO (EVSE contract DPO), region (EVSE location), and time zone (charging time). For example, in the example shown in FIG. 3, the charging unit price is high in area A where EVSE-1 to EVSE-3 are installed, and the charging unit price is low in area B where EVSE-4 to EVSE-6 are installed. Each EVSE included in the management facility 310 is an EVSE belonging to a site host contracted with the CPO, and registered in the server 300 at the time of contract. An EVSE registered in the server 300 is assigned an EVSE-ID (information for identifying the EVSE).

In order to use each EVSE (for example, EVSE-1 to EVSE-6) included in management facility 310, the user can download application software (hereinafter simply referred to as “app”) provided by server 300 to portable terminal 220. to install. The mobile terminal 220 can exchange information with the server 300 through the application. Mobile terminal 220 is configured to be able to communicate wirelessly with server 300 . The user can operate the application through the touch panel display of the mobile terminal 220, for example. A user can apply for registration to the server 300 through the application. The server 300 registers the user who applied for registration, and issues a user ID (information for identifying the user) to the user. The user ID is used for user authentication, information management, and the like.

Each EVSE included in management facility 310 requests user authentication from the user and identifies the user through the user authentication. The EVSE and server 300 compare information (for example, user ID and authentication code) input to the EVSE by the user with information registered in the server 300 to determine whether user authentication has succeeded. A user who succeeds in user authentication can use the EVSE. Each EVSE included in the management facility 310 has a configuration conforming to the EVSE 150 shown in FIG. 2, for example. In the plug-in state (state in which EVSE and vehicle 210 are electrically connected), the user can charge the power storage device of vehicle 210 using EVSE. When the EVSE is used by the user, EVSE usage history information (for example, charging start time, charging end time, and charge amount) is transmitted from the EVSE to the server 300 together with the user ID and EVSE-ID.

Note that the server 300 may accept an EVSE reservation from the user. When an EVSE is reserved by a user, the server 300 may allow only the reserved user to perform user authentication for the EVSE during the reserved period.

The server 300 manages information on registered users (hereinafter referred to as “user information”) and information on registered EVSEs (hereinafter referred to as “EVSE information”). Each of the user information and EVSE information is stored in the storage device of server 300 . User information is managed separately for each user by a user ID. EVSE information is managed separately for each EVSE by EVSE-ID. Each of the user information and EVSE information is updated from time to time.

Although the details will be described later, the user information includes the amount of electric power deposited by each user and the DPO of the deposit destination. Although not shown, the user information includes information about the DPO with which the user has a contract (for example, a customer ID used by the DPO to identify the user) and Further included are parameters (eg, password for login) and information about the user terminal (eg, communication address of mobile terminal 220).

The EVSE information includes each EVSE's location and contract DPO. Although not shown, the EVSE information also includes information indicating the charging unit price, usage fee, and usage history of each EVSE. The EVSE information may include a rate table for each time slot (information indicating the charging unit price for each time slot) according to the location of each EVSE and the contracted DPO. Then, server 300 may determine the charging unit price for each EVSE by referring to the price list for each EVSE. The EVSE usage fee is predetermined by the site host, for example. The EVSE usage fee may be a pay-as-you-go system or a flat rate. The server 300 updates the EVSE information each time it receives usage history information from the EVSE.

The EVSE information further includes the EVSE electricity rate and charging rate for each EVSE. The EVSE electricity charge and charging charge for each EVSE are calculated for each user and recorded in the server 300 . The EVSE electricity charge corresponds to the electricity charge for using EVSE. The server 300 can calculate the EVSE electricity bill based on the EVSE charging unit price and usage history information. The charging fee corresponds to the sum of the EVSE electricity fee and the EVSE usage fee. After using the EVSE, the user pays a charging fee according to the charging amount.

FIG. 4 is a diagram for explaining the flow of money regarding the use of EVSE. Referring to FIG. 4, schematic diagram F1 shows the money flow when CPO is not involved. If the site host does not have a contract with the CPO, the user using the EVSE pays the charging fee to the site host, as shown in schematic diagram F1. Then, the site host pays the contracted DPO the EVSE electricity charge out of the charging charge received from the user.

On the other hand, schematic diagram F2 shows the money flow when the CPO is involved. The CPO receives a service fee (consideration for providing service) from the site host and acts on behalf of the site host to deliver the money related to the use of EVSE that belongs to the site host. Specifically, as shown in a schematic diagram F2, the CPO collects charging charges (EVSE electricity charges and EVSE usage charges) from users who use the EVSE, and pays the EVSE electricity charges to the contracted DPO of the EVSE. The CPO then passes the EVSE usage fee collected from the user to the site host. The CPO may charge the user for the charge per unit period (for example, per month). The server 300 may prohibit the use of EVSE by the user who has not paid the charging fee by suspending the authentication of the user who refuses to pay the charging fee.

An EVSE belonging to a site host that has paid a service charge to the CPO is given an EVSE-ID and installed with operation software. The EVSE assigned the EVSE-ID is registered in the server 300 . The EVSE registered in the server 300 in this way becomes the management facility 310 . Information for each EVSE included in the management facility 310 is managed by the server 300 and maintained by the CPO.

In power feeding system 1 according to this embodiment, server 300 is configured to receive each of a power deposit application and a power withdrawal application from a user of vehicle 210 . Server 300 is configured to receive a power deposit application from a user, and upon confirming that power has been deposited according to this application, record the amount of deposited power in association with the user. Specifically, the user makes a power deposit application to the server 300 after depositing the power with the contracted DPO-1. Then, server 300 confirms whether power has been deposited to DPO-1. The user can entrust power to DPO-1 by performing reverse power flow from home to the power system PG. When the smart meter 143 (FIG. 2) detects the reverse power flow, the DPO-1 reduces the amount of power supplied to the power system PG by the power deposited by the user. This completes the deposit of electric power. The amount of electric power deposited (the amount of electric power deposited by the user in DPO-1) is stored in the storage device of server 300 as user information together with DPO-1 (the DPO of the deposit destination) (see FIG. 3).

The user whose deposited electric power amount is recorded in the server 300 supplies power to the vehicle 210 using the EVSE (target facility) whose contract DPO is DPO-1 among the plurality of EVSEs included in the management facility 310. In this case, when the user submits a power withdrawal application to the server 300, the server 300 requests that at least part of the deposited electric power be withdrawn and supplied to the target facility using the DPO-1 (power supply to target facility). (Electricity companies that In response to this notification, DPO-1 supplies at least part of the electric power received from the user to power system PG. This completes the drawing of power. When the user withdraws and uses the deposited power, no electricity charge is incurred for the withdrawn power. That is, the EVSE electricity bill is reduced by the drawn electricity (see FIG. 4).

Processing related to user registration, power deposit, car navigation, and power withdrawal executed in power supply system 1 according to this embodiment will be described below with reference to FIGS. 5 to 8. FIG.

FIG. 5 is a diagram for explaining the processing related to user registration executed in the power supply system 1 according to this embodiment. Referring to FIG. 5 together with FIG. 1, when the user launches the application on mobile terminal 220, a login screen S1 is displayed. The login screen S1 includes a registration button M11. The user can apply for registration to server 300 by operating registration button M11. When server 300 receives a registration application from a user, server 300 performs user registration according to the application. A registered user is given a user ID and a password for login. When the server 300 transmits these pieces of information to the mobile terminal 220, the mobile terminal 220 displays the registration completion screen S2. The issued user ID and password for login are displayed on the registration completion screen S2. After that, the mobile terminal 220 displays the login screen S1 again.

The login screen S1 further includes user ID and password entry fields and a login button M12. When the user inputs the user ID and password issued by the server 300 to the login screen S1 and operates the login button M12, the login succeeds and the home screen S3 is displayed. Passwords are managed by the server 300 and changed according to requests from users.

The home screen S3 includes a deposit button M31, a withdrawal button M32, a NAVI button M33, and an authentication button M34. When the user operates the authentication button M34, the mobile terminal 220 displays an authentication code for using each EVSE included in the management equipment 310. FIG. The authentication code may be a barcode or two-dimensional code, and may be composed of at least one of letters, numbers, and symbols. When using EVSE, the user inputs the authentication code into EVSE. The EVSE may include a reader for reading barcodes or two-dimensional codes displayed on mobile terminal 220 . The EVSE compares the authentication code input by the user with the authentication code issued by the server 300 to determine whether the user authentication has succeeded.

The deposit button M31, the withdrawal button M32, and the NAVI button M33 will be described later. The home screen S3 also displays the current amount of electric power deposited. The user can determine whether or not to deposit/withdraw power based on the current amount of deposited power.

FIG. 6 is a diagram for explaining processing related to power deposit executed in the power supply system 1 according to this embodiment. Referring to FIG. 6 together with FIG. 1, when the user operates the deposit button M31 on the home screen S3 shown in FIG. 5, the mobile terminal 220 displays the power deposit application screen S4. After depositing power to the contracted DPO-1, the user operates the power deposit application screen S4 to apply to the server 300 for power deposit. Specifically, the user instructs the PCS 120 (control device 124) to reversely flow the power generated by the solar panel 110 or the stored power of the ESS 130 shown in FIG. Power can be deposited to -1. In addition, after the user inputs the DPO of the deposit destination (DPO-1 in this embodiment) and the amount of deposited electric power (equivalent to the amount of reverse power flow) to the electric power deposit application screen S4, By operating the , decision button, the server 300 can apply for power deposit. When the decision button is operated on the power deposit application screen S4, the mobile terminal 220 transmits the information input by the user to the server 300 together with the user ID.

When the server 300 receives the power deposit application from the mobile terminal 220, it requests the server 610 belonging to DPO-1 to confirm power reception. At this time, the server 300 transmits the customer ID (customer ID corresponding to the user ID) and the amount of deposited power to the server 610 . Server 610 identifies the target user based on the customer ID. Then, server 610 determines whether power is received or not (that is, whether or not power is deposited) based on the measured value of smart meter 143 . When the server 610 confirms the power reception, the server 610 updates the deposited power amount included in the customer information. After that, server 610 notifies server 300 of the confirmation of power reception, the date and time of power reception, and the amount of power received. Hereinafter, this notification is also referred to as "notification of power reception".

When server 300 receives the power reception notification from server 610, server 300 updates the deposited power amount included in the user information (FIG. 3). After that, the server 300 notifies the portable terminal 220 that the power deposit has been completed. Hereinafter, this notification is also referred to as "deposit completion notification".

When the portable terminal 220 receives the deposit completion notification from the server 300, the deposit completion screen S5 is displayed. The updated deposit power amount (deposit power amount increased by the current deposit) is displayed on the deposit completion screen S5.

FIG. 7 is a diagram for explaining the processing related to car navigation executed in the power supply system 1 according to this embodiment. Referring to FIG. 7 together with FIG. 1, when the user operates NAVI button M33 on home screen S3 shown in FIG. 5, portable terminal 220 displays navigation screen S6. In the example shown in FIG. 7, the navigation screen S6 is displayed on the mobile terminal 220 carried by the user in the vehicle 210 (the user in the vehicle).

When the user operates the NAVI button M33 on the home screen S3, the server 300 transmits information of each EVSE included in the management facility 310 (for example, location, specification, charge rate, and contract DPO) to the mobile terminal 220. Then, the application of the mobile terminal 220 cooperates with the map database to display the position of each EVSE included in the management facility 310 on the map. In the navigation screen S6 according to this embodiment, the EVSE (hereinafter referred to as "first EVSE") from which the user can withdraw the power deposited is distinguished from other EVSEs (hereinafter referred to as "second EVSE"). and displayed on the map. The contracted DPO of the first EVSE matches the DPO to which the user has deposited power. In the navigation screen S6 shown in FIG. 7, a mark M61 indicates the position of the vehicle 210, a mark M62 indicates the position of the first EVSE, and a mark M63 indicates the position of the second EVSE. The user can confirm the position of the first EVSE by looking at the navigation screen S6.

The navigation screen S6 may display specifications of each EVSE (for example, power supply system (AC/DC), connector type, voltage, and maximum output), charge rate, and contract DPO. Alternatively, a car navigation system (including a display device) installed in vehicle 210 may display navigation screen S<b>6 instead of mobile terminal 220 .

FIG. 8 is a diagram for explaining a process related to drawing power that is executed in the power supply system 1 according to this embodiment. Referring to FIG. 8 together with FIG. 1, when the user operates withdrawal button M32 on home screen S3 shown in FIG. 5, portable terminal 220 displays electric power withdrawal application screen S7. When the user charges battery B mounted on vehicle 210 using the first EVSE (for example, EVSE-1 shown in FIG. 8), the user first operates authentication button M34 to complete user authentication. After that, the withdrawal button M32 is operated to cause the portable terminal 220 to display the power withdrawal application screen S7. In the example shown in FIG. 8, EVSE-1 corresponds to the target equipment.

After inputting the DPO (DPO-1 in this embodiment) from which power is to be drawn and the amount of power to be drawn on the power withdrawal application screen S7, the user operates the decision button to apply for power withdrawal to the server 300. can be done. The withdrawn power amount is the power amount withdrawn by the user, and can be arbitrarily set as long as it is within the deposited power amount. When the determination button is operated on the power withdrawal application screen S7, the mobile terminal 220 transmits the information input by the user to the server 300 together with the user ID.

When the server 300 receives the power withdrawal application from the mobile terminal 220, the server 300 notifies the server 610 belonging to DPO-1 that at least part of the deposited electric power will be withdrawn and supplied to EVSE-1. Specifically, server 300 requests server 610 to withdraw the electric power deposited by the user. At this time, the server 300 transmits to the server 610 the customer ID (customer ID corresponding to the user ID), the location and EVSE-ID of the EVSE-1, and the amount of power drawn.

When the server 610 receives a power withdrawal request from the server 300, the server 610 identifies the target user based on the customer ID, and identifies the target equipment (EVSE-1) based on the location and the EVSE-ID. When the user starts charging the battery B using the EVSE-1, the server 610 measures the amount of charge by the power meter PM built in the EVSE-1.

Server 610 determines whether or not power has been drawn (that is, whether or not power has been drawn) based on the measured value of power meter PM. When the withdrawal of electric power is confirmed, the server 610 updates the amount of electric power deposited and the amount of electric power withdrawn included in the customer information. After that, the server 610 notifies the server 300 of the confirmation of the withdrawal of electric power, the date and time of withdrawal, and the amount of electric power withdrawn. Hereinafter, this notification is also referred to as "withdrawal notification".

DPO-1 supplies power to power grid PG in response to the power draw. Furthermore, while charging by EVSE-1 continues, DPO-1 supplies power to power system PG according to the amount of charge. The power supplied by DPO-1 is supplied to EVSE-1 via power system PG. The server 610 confirms the amount of charge (the amount of power used) based on the measured value of the power meter PM. The server 610 updates the power consumption included in the customer information when charging by the EVSE-1 is completed. Further, when charging by the EVSE-1 is completed, the EVSE-1 transmits usage history information (for example, charging start time, charging end time, and charging amount) to the server 300. FIG.

When server 300 receives the withdrawal notice from server 610, server 300 updates the amount of deposited power included in the user information (FIG. 3). After that, the server 300 notifies the portable terminal 220 that the power withdrawal has been completed. Hereinafter, this notification is also referred to as "withdrawal completion notification".

When the portable terminal 220 receives the withdrawal completion notification from the server 300, the withdrawal completion screen S8 is displayed. The withdrawal completion screen S8 displays the updated deposited electric energy (deposited electric energy decreased by the current withdrawal).

According to the power supply system 1 described above, the user can make a power deposit using surplus power at home, and use EVSE with a high charge rate (for example, EVSE-1 to EVSE-3 shown in FIG. 3) at an outside location. By withdrawing electric power when using , the burden of electricity charges can be reduced. This prevents the charging fee from becoming excessively high.

The user may make a power deposit using power procured by a method other than private power generation. For example, the user may deposit power purchased from a low-cost DPO whose electricity rate is lower than that of DPO-1 to the low-cost DPO. FIG. 9 is a diagram showing a modification of the form of power deposit and power withdrawal. In the example shown in FIG. 9, DPO-2 corresponds to the cheap DPO.

Referring to FIG. 9 together with FIG. 1, in this modification, the user submits a power purchase application to DPO-2. Then, when a power trading contract is established between the user and DPO-2, the user informs DPO-2 of the user ID. The server 620 belonging to DPO-2 manages information about users using user IDs. The power purchased by the user is stored in the ESS 621 owned by DPO-2, for example. Then, the deposited electric power amount and the date and time of deposit are linked with the user ID and recorded in the server 620 .

The user uses the mobile terminal 220 to apply for power deposit to the server 300 . The power deposit application includes the DPO of the depositee (DPO-2 in this modification), the amount of power deposited (corresponding to the amount of power purchased by the user), and the user ID. When the server 300 receives the power deposit application from the mobile terminal 220, it requests the server 620 belonging to DPO-2 to confirm the deposit. In response to this request, server 620 notifies server 300 that the deposit has been confirmed, the date and time of deposit, and the amount of deposited electric power. Upon receiving the notification from server 620, server 300 updates the deposited power amount included in the user information (FIG. 3). After that, the server 300 notifies the portable terminal 220 that the power deposit has been completed.

When the user uses the EVSE-1 to charge the battery B (the power storage device of the vehicle 210) and withdraws the power deposited in the DPO-2, the user uses the portable terminal 220 to transfer the power to the server 300. Apply for withdrawal. The power drawing application includes the DPO from which power is to be drawn (DPO-2 in this variant), the amount of power to be drawn, and the user ID. When the server 300 receives the power withdrawal application from the mobile terminal 220, the server 620 belonging to DPO-2 transmits the power withdrawal amount and the user ID to request the power withdrawal. DPO) notifies server 610 belonging to DPO-1 to withdraw at least part of the deposited electric energy and supply it to EVSE-1. The notification to server 610 includes the DPO drawing power (DPO-2), the customer ID (customer ID corresponding to the user ID above), the location and EVSE-ID of EVSE-1, and the amount of power drawn.

When the server 620 receives the above-mentioned power drawing request from the server 300, the DPO-2 draws the designated electric energy (withdrawal electric energy) from the ESS 621 and supplies it to the electric power system PG. Power drawn from ESS 621 is supplied to EVSE-1 via power system PG. After that, the server 620 updates the information about the user (in particular, the amount of deposited power).

On the other hand, when the server 610 receives the above notification from the server 300, the DPO-1 supplies power to the power system PG by the amount of the amount charged by the EVSE-1 that exceeds the drawn power amount. When charging by the EVSE-1 is completed, the server 610 updates the amount of power used and the amount of power drawn included in the customer information.

The CPO may provide users with services related to power deposit/power withdrawal in the manner described above. In the above modification, the power purchased by the user is deposited in the ESS 621 of DPO-2. However, the present invention is not limited to this, and the power purchased by the user may be deposited in the ESS owned by the CPO.

The user terminal of vehicle 210 is not limited to a terminal carried by the user of vehicle 210 (portable terminal 220 ), and may be a terminal mounted on vehicle 210 . The aforementioned apps may be installed on a user terminal mounted on the vehicle 210 .

A user terminal mounted on vehicle 210 may communicate with server 300 via EVSE when drawing power. FIG. 10 is a diagram showing a modification of the form of power draw shown in FIG.

Referring to FIG. 10 together with FIG. 1, in this modification, the aforementioned application is installed in an ECU (Electronic Control Unit) (not shown) mounted on vehicle 210 . The ECU is configured to communicate with server 300 via EVSE-1. The ECU applies to the server 300 for power withdrawal via the EVSE-1. For example, EVSE-1 applies to server 300 for withdrawal of electric power in response to a request from the ECU. Also, the ECU performs user authentication by communicating with the EVSE-1. Electricity withdrawal application screen S7 and withdrawal completion screen S8 are displayed on a display device mounted on vehicle 210 (for example, a display device of a car navigation system).

In the above embodiment, each EVSE included in the management facility 310 is an EVSE that receives power supply from one DPO (contract DPO). However, without limitation, the management facility 310 may include EVSEs powered by multiple DPOs. The EVSE may be configured to receive power from a user-selected DPO of multiple DPOs.

In the above-described embodiment, the CPO provides users free of charge with services related to power deposit/power withdrawal. However, the CPO is not limited to this, and the CPO may receive a small service charge from the user that the user does not lose. The CPO may also charge the user a fee for power deposit and/or power withdrawal. In addition, the CPO may charge the user for the cost of power storage when the power is stored for a long period of time.

The CPO may limit the target power of the deposit. The server 300 may accept only an application (electricity deposit application) for depositing electric power that satisfies predetermined requirements (for example, renewable energy or large electric power equal to or greater than a predetermined amount of power).

The CPO may limit the timing of power deposits and/or power withdrawals. The server 300 may designate the timing of the power deposit when receiving the power deposit application from the user. The server 300 may specify the timing of power withdrawal when receiving a power withdrawal application from the user. The server 300 may designate the timing of power deposit and/or power withdrawal so as to suppress the imbalance. Further, server 300 may be configured not to accept a power withdrawal application until a predetermined period of time has passed since the power deposit was made.

The power system PG is not limited to a large-scale power grid developed as infrastructure, but may be a microgrid. The vehicle is not limited to a POV (personally owned vehicle), but may be a MaaS (Mobility as a Service) vehicle. A MaaS vehicle is a vehicle managed by a MaaS provider. Vehicles are not limited to passenger cars, and may be buses or trucks. The vehicle may be configured to be capable of contactless charging. The vehicle may be configured to be self-drivable or may be equipped with a flight function. The vehicle may be an unmanned, drivable vehicle (eg, an automated guided vehicle (AGV) or an agricultural machine).

The various modifications described above may be combined arbitrarily and implemented.
The embodiments disclosed this time should be considered as examples and not restrictive in all respects. The scope of the present invention is indicated by the scope of the claims rather than the description of the above-described embodiments, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

1 power supply system, 100 house, 110 solar panel, 121,123 DC/DC converter, 122 inverter, 124 control device, 130 ESS, 141 distribution board, 142 electric power load, 143 smart meter, 150 EVSE, 210 vehicle, 220 Mobile Terminal, 300 Server, 310 Management Facility, 320 Settlement System, 610, 620 Server, 621 ESS, B Battery, PG Power System.

Claims (1)

A power supply system including a server that manages a plurality of power supply facilities,
each of the plurality of power supply facilities is configured to supply power to the vehicle;
The server is configured to receive each of a power deposit application and a power withdrawal application from a user of the vehicle,
When the server receives the power deposit application from the user and confirms that power has been deposited according to the application, the server records the amount of deposited power in association with the user,
When the user whose deposited power amount is recorded in the server supplies power to the vehicle using a target facility that is one of the plurality of power supply facilities, the user submits the power withdrawal application. When performed on the server, the server is configured to notify an electric utility supplying power to the target facility that at least part of the deposited power amount will be withdrawn and supplied to the target facility. power supply system.

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